php - 显示所有时间约会和保留

Question

我的约会系统有一些经理(例如医生)，我打算将所有约会时间显示在一个表格中，以便用用户名填写或留空约会 为时间约会创建一个表:

+-----------+-----------+
| id         | time 
+-----------+------------
| 1         | 10:00     |
| 2         | 10:30     |
| 3         | 11:00     |
| 4         | 11:30     |
| 5         | 12:00     |
| 6         | 12:30     |
| 7         | 13:00     |
| 8         | 13:30     |
| 9         | 14:00     |
+-----------+-----------+

经理表

+-----------+-------------+-----------+
| id         | name       | phone     |
+-----------+-------------+-----------+
| 1         | alex        | 123456    |
| 2         | dany        | 123456    |

用户表:

+----+------+-------+-----------+
| id | manager_id | name | phone |
+----+------------+------+-----------+
| 1  | 1       |   John  | 123456   |
| 2  | 1       |   Sara  | 123456   |
| 3  | 2       |   lorem | 123456   |
+----+------+-------+-----------+

和订单表(用于约会)

+----+------+-------+------------------+-----------+
| id | manager_id | userid  | reserveid| datereserve
+----+------------+------+-------------+-----------+
| 1  | 1       |   1        | 1        |2016/12/28
| 2  | 1       |   2        | 2        |2016/12/28
| 3  | 2       |   3        | 3        |2016/12/28
+----+------+-------+-----------+-----------+------+

现在我想在一个表格中显示保留时间，其中约会用用户名填充或清空 喜欢 : Similar this photo

我加入了查询中的所有表，但无法显示相似的照片和获取数据:( 我该如何实现？

Answer 1

SELECT 
  m.name,
  a.time,
  u.phone,
  u.name <- if u.name or u.phone is NULL, then appointment is free now
FROM manager as m
CROSS JOIN appointments as a
LEFT JOIN order as o ON o.manager_id = m.id AND o.appointmentsid = a.id 
LEFT JOIN user as u ON u.id =  o.userid

#for some doctor
WHERE m.id = DoctorID